 MD 30 crosses Dug Hill Ridge just north of MD 86 and passes through the community of Melrose, where the highway intersects MD 496 (Bachmans Valley Road) and Wentz Road.The state highway follows the upper reaches of the South Branch of Gunpowder Falls through a ridge to the river's source before reaching its northern terminus at the Pennsylvania state line.The highway continues as PA 94 (Baltimore Pike) through southwestern York County to Hanover.